Operating a low-energy Electron Cooler at the Cryogenic Storage Ring CSR

This thesis reports on the finalization of the implementation and the first operation of the low-energy electron cooler at the cryogenic storage ring CSR at the Max-Planck-Institut für Kernphysik in Heidelberg. The operational system of the CSR electron cooler was set up and commissioned. For this purpose, a high-voltage platform has been build to control the electron beam optics. The second cryogenic beam time (spring/summer 2017) of the CSR was used to show for the first time longitudinal phase space cooling via electron cooling at an electrostatic storage ring. Furthermore, betatron oscillations of a C−2 ion beam have been observed allowing optimizations of the CSR’s injection which contributes to the feasibility of merged-beam experiments with electrons. With this, the CSR electron cooler is ready for quantum dynamical studies on dissociative electron recombination in a cryogenic environment in the next beam time